CN110640293A

CN110640293A - Welding base capable of quickly changing surface and welding device

Info

Publication number: CN110640293A
Application number: CN201910921874.3A
Authority: CN
Inventors: 李俊杰; 蒋濛; 胡庆波
Original assignee: Linkdata New Energy Co Ltd
Current assignee: Linkdata New Energy Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-01-03

Abstract

The invention discloses a welding base capable of quickly changing surfaces, which comprises a bottom die body, a backing plate seat and a side baffle, wherein the outer contour of the bottom die body is a straight cylinder; the base plate is detachably connected with the base plate seat and/or the side baffle; the bottom die body is provided with a central through hole, the orifice of the central through hole is positioned on the end surface of the bottom die body, a connecting piece is arranged in the central through hole in a penetrating manner, and the bottom die body is detachably and fixedly connected with the side baffle through the connecting piece. This trade welding base of face fast is rational in infrastructure, and through setting up the gasket in the bottom of die block body, the backing plate can be dismantled with the backing plate seat and be connected, when the surface of die block body appears wearing and tearing because of long-time welding, takes out the gasket, through loosening the screw rod soon, realizes the face of trading of die block body around the rotatory die block body of screw rod. The invention also discloses a welding device comprising the welding base with the quick surface changing function.

Description

Welding base capable of quickly changing surface and welding device

Technical Field

The invention relates to the technical field of lithium battery production, in particular to a welding base capable of quickly changing surfaces and a welding device.

Background

The winding type battery cell or the laminated battery cell of the lithium battery consists of a pole piece and a pole lug, and the pole lug is connected with the pole piece through welding. The commonly used method for welding the pole piece and the pole lug at present is ultrasonic welding. The ultrasonic welding equipment mainly comprises a welding head and a bottom die, a pole piece foil penetrates between the welding head and the bottom die, and a pole lug extends between the welding head and the bottom die through an intermittent feeding mechanism. The working process of the welding equipment is as follows: the welding head and the bottom die clamp the pole piece foil and the pole lugs, the welding head outputs high-quality vibration waves, and the pressed and attached pole piece foil and the pole lug attaching surfaces rub with each other to form fusion between molecular layers.

In the prior art, a bottom die is arranged opposite to a welding head, the bottom die is usually arranged right below the welding head, the bottom die is fixedly connected with an operating platform through bolts and the like, and the bottom die is made of metal alloy materials such as tungsten alloy and the like. According to the welding requirements of the pole piece and the pole lug, at least two salient points are arranged on the welding head, the bottom surfaces of the salient points are planar, and the plane is parallel to the compression surface of the bottom die. After long-time ultrasonic welding, the pressure surface of the bottom die is seriously worn, and the surface of the bottom die needs to be changed or the bottom die needs to be changed.

The bottom die in the prior art has the defects of face replacement or replacement: firstly, the replacement operation is complicated, the time consumption is long, the pressure surface of the bottom die needs to be adjusted by high-precision flatness, otherwise, the welding defects such as pole piece tab damage, insufficient welding, inconsistent welding strength and the like are easily caused; secondly, taking a cubic bottom die as an example, two cubic surfaces which are vertical to the axial direction of the screw hole can be used as pressure surfaces, and the bottom die needs to be replaced after two surface changes, so that the maintenance cost of the welding device is directly increased.

Disclosure of Invention

One of the objectives of the present invention is to overcome the drawbacks of the prior art and to provide a welding base with a quick surface changing function.

In order to achieve the technical effects, the technical scheme of the invention is as follows: a welding base capable of quickly changing surfaces comprises a bottom die body and is characterized in that the outer contour of the bottom die body is a straight cylinder body, the welding base further comprises a base plate, a base plate seat and a side baffle, the base plate is arranged below the bottom die body in a contact mode, and the side baffle is arranged on one side of the end face of the bottom die body; the base plate is detachably connected with the base plate seat and/or the side baffle; the improved die comprises a bottom die body and is characterized in that a central through hole is formed in the bottom die body, an orifice of the central through hole is located in the end face of the bottom die body, a connecting piece is arranged in the central through hole in a penetrating mode, and the bottom die body is connected with a side baffle in a detachable fixed connection mode through the connecting piece.

The preferable technical scheme is that the outer contour of the bottom die body is a straight prism with even number of side edges, and the end face of the bottom die body is a regular polygon.

The preferred technical scheme does, be provided with at least a set of welding pressure sand grip on the circumference side of die block body, in groups welding pressure sand grip quantity equals the prismatic lateral edge number of straight, in groups welding pressure sand grip is in even interval distribution on the circumference side of die block body.

The preferable technical scheme does, the right prism is the cube, the side of die block body is provided with two sets of pressure sand grip that welds, weld the pressure sand grip with the side edge is adjacent to be set up.

The cushion plate seat is provided with a limiting groove, and the cushion plate is arranged in the limiting groove in a matching mode.

The preferable technical scheme is that the base plate and the base plate seat are provided with matched pin holes, and pin shafts penetrate through the pin holes.

The preferred technical scheme is that the axial direction of the limiting groove is consistent with the axial direction of the central through hole.

The preferable technical scheme is that the cushion plate seat is fixedly connected with the side baffle.

The welding device comprises a welding head and is characterized by further comprising the welding base with the quick surface changing function, wherein the welding head is arranged opposite to the side surface of the bottom die body.

The invention also provides a welding device, which comprises a welding head and is characterized by further comprising the welding base with the quick surface changing function, wherein the welding head is arranged opposite to the welding pressing convex strip.

The invention has the advantages and beneficial effects that:

the welding base for quickly changing the surface is reasonable in structure, the gasket is arranged at the bottom of the bottom die body, the base plate is detachably connected with the base plate seat, when the surface of the bottom die body is abraded due to long-time welding, the gasket is taken out, and the bottom die body is rotated around the screw rod to realize surface changing of the bottom die body by loosening the screw rod;

compared with the screw connection in the prior art, each side surface of the bottom die body can be used as a welding surface, the surface changing time is greatly shortened, and the flatness of the welding surface of the bottom die body after surface changing tends to be more accurate.

Drawings

FIG. 1 is a schematic perspective view of a welding base for rapid surface change in accordance with example 1;

FIG. 2 is another perspective view of the welding base for rapid surface changing in accordance with embodiment 1;

FIG. 3 is a schematic front view of a welding base for rapid surface replacement according to embodiment 1;

FIG. 4 is a schematic perspective view of a body of a mold in example 1;

FIG. 5 is a schematic view showing a connection structure of the pad, the pad holder and the side dams in example 1;

FIG. 6 is a schematic front view of a welding base for rapid surface replacement in embodiment 2;

FIG. 7 is a schematic front view showing a structure of a welding base for surface quick change in embodiment 3;

FIG. 8 is a schematic perspective view of a welding base for rapid surface replacement according to example 4;

FIG. 9 is a schematic front view of a welding apparatus according to embodiment 5;

FIG. 10 is a schematic front view of a welding apparatus according to embodiment 6;

in the figure: 1. a bottom die body; 2. a base plate; 3. a pad seat; 31. a substrate; 32. blocking strips; 4. a side dam; 5. a central through hole; 6. a bolt; 7. a nut; 8. a limiting groove; 9. a first pin shaft; 10. welding and pressing the convex strips; 11. a welding head; 12. a second pin shaft; 13. and (7) positioning the holes.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

The outline of the bottom die body is a straight cylinder

The bottom die body is used for providing a welding pressing plane parallel to the bottom surface of the welding head and realizing surface replacement of the welding pressing plane when the bottom die body rotates around the central through hole. The bottom die body with the outer contour of the straight cylinder comprises but not limited to a straight prism with a regular polygon end face, and also comprises a cylindrical straight cylinder or a straight cylinder with a special-shaped end face.

Preferably, the outer contour straight prism of the bottom die body has an even number of side edges, the end face of the die body is a regular polygon, namely, a certain side face of the bottom die body is in contact with the horizontal plane of the base plate, and the top face of the bottom die body is a horizontal welding and pressing face.

The side of die block body can directly be as welding the face of pressure, and further, be provided with the welding on the side of die block body and press the sand grip, the top surface that welds the sand grip promptly is the welding face. The number of the welding pressing convex strips is one or more, and the width of the welding pressing convex strips is determined according to the size of the welding head.

Further, in order to ensure that the bottom die body with the welding pressing strips is stably contacted with the base plate in the welding state, two groups of welding pressing protruding strips are arranged on the circumferential side surface of the bottom die body, namely, two groups of welding pressing protruding strips are arranged on each side surface of the bottom die body. Furthermore, two welding press convex strips are arranged adjacent to the two side edges of the side surface. Specifically, in order to facilitate the manufacture of the bottom mold body, the welding pressing protruding strips located on both sides of the same side edge are integrally connected, that is, the combined welding pressing protruding strips are arranged on the outer edge of the side edge in a coating manner.

Bottom die body and backing plate

The backing plate is arranged at the bottom of the bottom die body in a contact manner. The base plate is used for providing a horizontal base surface for the bottom die body. In order to ensure the stability of the die body in the use state, the contact form between the side surface of the die body and the shim plate is preferably surface contact.

Specifically, when the bottom surface of the welding head is a horizontal plane, or the bottom surface of a welding spot of the welding head is a horizontal plane, the bottom die body is in horizontal contact with the base plate, or a horizontal groove matched with the bottom die body is formed in the base plate, and the shape of the cross section of the groove is determined according to the shape of the side face of the bottom die body. For example, when the end surface of the bottom die body is a regular polygon and the number of the sides of the regular polygon is odd, the horizontal groove can be in a V shape, the included angle of the groove surface of the V-shaped groove is equal to the inner angle of the regular polygon, and when the side edge of the bottom die body is located in the V-shaped groove, the top surface of the bottom die body is a horizontal welding and pressing surface; when the number of the sides of the regular polygon is odd, two opposite side surfaces of the bottom die body are parallel, and the top surface of the cushion plate is a plane.

Mat plate seat

The purpose of the base plate seat is to position the base plate and restrain the movement of the base plate in the horizontal plane, and the optional range comprises all known connecting structures which meet the functions. The mat base in the broadest sense may be the worktop or a locating element provided on the worktop. Furthermore, the base plate seat and/or the side baffle plate can be used as a fixing piece for restricting the movement of the base plate in the horizontal plane. In order to conveniently detach the base plate, a limiting groove matched with the bottom die body, a pin shaft between the base plate and the base plate seat, and the combination of the limiting groove and the pin shaft restrict the movement of the base plate in a horizontal plane are further arranged on the base plate seat.

Side baffle

The side baffle is used for being detachably connected with the bottom die body through a connecting piece. In actual production, the side baffle can be directly fixed on the operation surface, and can also be fixedly connected with the base plate seat to form an L shape.

Connecting piece arranged in central through hole in penetrating mode

The connecting piece is used for providing a rotating shaft for the bottom die body and enabling the bottom die body to be detachably connected with the side baffle, and the selectable range comprises all known connecting structures meeting the functions. Including but not limited to the following structures:

1. the connecting piece is a screw rod, the side baffle is provided with a positioning hole, the screw rod is arranged in the central through hole and the positioning hole in a penetrating mode in a welding state, and the bottom die body and the side baffle are clamped between nuts at two ends of the screw rod or between the nuts and a screw rod cap part;

2. the side baffle is provided with a positioning hole, a piston rod of the linear air cylinder or the linear oil cylinder penetrates through the central through hole and the positioning hole, the end part of the piston rod is provided with a limiting block, a cylinder body of the linear air cylinder or the linear oil cylinder is connected with the side baffle, and the bottom die body and the side baffle are clamped between the limiting block and the cylinder body.

3. The side baffle is provided with a screw hole, the screw rod penetrates through the central through hole and is in threaded fit with the screw hole, and the bottom die body is clamped between the cap of the screw rod and the side baffle in a welding state.

The linear cylinder or the linear cylinder described above may be replaced by known reciprocating members or reciprocating mechanisms, etc.

Furthermore, a gap exists between the cross-connecting section of the connecting piece penetrating through the central through hole and the central through hole, and the distance between the central shaft of the cross-connecting section and the base plate is slightly larger than the distance between the central shaft of the central through hole and the base plate in a welding state.

Example 1

As shown in fig. 1 to 5, the welding base with the quickly replaced surface of embodiment 1 includes a bottom die body 1, the outer contour of the bottom die body 1 is a cube, and further includes a flat-plate-shaped backing plate 2, a backing plate seat 3, and a side baffle 4, the backing plate 2 is disposed below the bottom die body 1 in a contact manner, and the side baffle 4 is disposed on one side of the end surface of the bottom die body 1; the base plate 2 is detachably connected with the base plate seat 3; a central through hole 5 is formed in the bottom die body 1, an orifice of the central through hole 5 is located on the end face of the bottom die body 1, a positioning hole 13 which is equal to the central through hole 5 in height is formed in the side baffle, a bolt 6 penetrates through the central through hole 5 and the positioning hole 13, and the side baffle 4 and the bottom die body 1 are located between a cap of the bolt 6 and a nut 7.

The side of die block body 1 is provided with two sets of welding pressure sand grip 10, and welding pressure sand grip 10 sets up with the side arris on side both sides is adjacent, and welding pressure sand grip 10 and die block body coupling of side arris both sides. The grouped welding press convex strips 10 are distributed in an annular array by taking the central shaft of the central through hole 5 as the center, and two welding press convex strips 10 positioned on the same side surface are symmetrically arranged on two sides of the connecting line of the middle points of the end edges of the side surface.

Backing plate 2 is with backing plate seat 3's detachable connection structure does: the base plate seat 3 is provided with a limit groove 8, and the base plate 2 is arranged in the limit groove 8 in a matching way; the axial direction of the limiting groove 8 is consistent with the axial direction of the central through hole 5. The backing plate seat 3 is fixedly connected with the side baffle 4. The backing plate 2 and the backing plate base 3 are provided with matched pin holes, and first pin shafts 9 penetrate through the pin holes.

Example 2

As shown in fig. 6, example 2 is based on example 1, with the difference that: in example 1, the bottom die body 2 was cubic, and the side surface of the bottom die body 1 was directly used as a bonding surface.

Example 3

As shown in fig. 7, example 3 is based on example 1, with the difference that: the outer contour of the bottom die body 1 in embodiment 3 is a regular pentagonal prism, the cushion plate 2 is provided with a V-shaped groove with a groove surface included angle of 120 °, the circumferential side surface of the bottom die body 1 is provided with five welding press convex strips 10, the welding press convex strips 10 are arranged in the middle of the side surface of the bottom die body 1 in a one-to-one correspondence manner, and the end surfaces of the welding press convex strips 10 are flush with the end surfaces of the bottom die body 1.

Example 4

As shown in fig. 8, example 4 is based on example 1, with the difference that: the base plate seat 3 comprises a base plate 31, a blocking strip 32 arranged on the base plate 31, a matching groove matched with the base plate 2 and formed by combining the blocking strip 32 and the side baffle 4, the axial direction of the matching groove is perpendicular to the axial direction of the central through hole 5, and the base plate 31, the base plate 2 and the side baffle 4 are connected through a second pin shaft 12.

Example 5

As shown in fig. 9, the welding apparatus of example 5 is different from that of example 2 in that a horn 11 is provided corresponding to the die body 1.

Example 6

As shown in fig. 10, the welding apparatus of example 6 is different from that of example 1 in that a horn 11 is provided corresponding to a welding bead 10 of a die body.

The bottom die body surface changing (switching welding bead 10) of examples 1 to 4 includes the steps of:

1. pulling out the first pin shaft 9 or the second pin shaft 12 of the backing plate 2 and the backing plate seat 3, and taking out the backing plate 2;

2. loosening the nut 7 to enable the nut 7, the end face of the bottom die body 1, the side baffle and the cap part of the bolt 6 to be in a non-pressing state;

3. rotating the bottom die body 1 around the bolt 6, inserting the backing plate 2 between the bottom die body 1 and the backing plate seat 3, and contacting the bottom surface of the bottom die body 1 with the top surface of the backing plate 2 due to self weight;

4. the base plate 2 and the first pin shaft 9 or the second pin shaft 12 of the base plate seat 3 are inserted, and the nut 7 is screwed down to enable the nut 7, the end face of the bottom die body 1, the side baffle and the cap part of the bolt 6 to be in a mutually pressing state.

In the welding apparatus of embodiment 6, the position of the welding head 11 in the horizontal plane remains unchanged, and when all the sets of welding pressure protruding strips 10 in the bottom die body 1 are worn, the end surface of the bottom die body 1 is turned to be pressed against the side baffle plate, so that the end surface of the bottom die body 1 that was pressed against the nut 7 is adjusted to be pressed against the side baffle plate, and then another set of welding pressure protruding strips 10 can be used, and similarly, the bottom die body surface changing step of the above-mentioned embodiments 1 to 4 is implemented, and the switching use of the same set of four welding pressure protruding strips 10 is realized. In summary, the number of the weld beads 10 corresponding to the welding head 11 in example 6 is eight.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A welding base capable of quickly changing surfaces comprises a bottom die body and is characterized in that the outer contour of the bottom die body is a straight cylinder body, the welding base further comprises a base plate, a base plate seat and a side baffle, the base plate is arranged below the bottom die body in a contact mode, and the side baffle is arranged on one side of the end face of the bottom die body; the base plate is detachably connected with the base plate seat and/or the side baffle; the improved die comprises a bottom die body and is characterized in that a central through hole is formed in the bottom die body, an orifice of the central through hole is located in the end face of the bottom die body, a connecting piece is arranged in the central through hole in a penetrating mode, and the bottom die body is connected with a side baffle in a detachable fixed connection mode through the connecting piece.

2. The welding base capable of changing surfaces rapidly as claimed in claim 1, wherein the outer contour of the bottom die body is a rectangular prism with an even number of side edges, and the end surface of the bottom die body is a regular polygon.

3. The welding base of changing face fast of claim 2, characterized in that, be provided with at least one set of welding pressure sand grip on the circumference side of die block body, the quantity of the welding pressure sand grip of ganging equals the lateral edge number of right prism, ganged welding pressure sand grip evenly spaced apart distribution on the circumference side of die block body.

4. The welding base of claim 3, wherein the rectangular prism is a cube, and two sets of welding press ribs are disposed on the side surface of the bottom die body, and the welding press ribs are disposed adjacent to the side edges.

5. The welding base capable of changing surfaces rapidly as claimed in claim 1, wherein a limiting groove is formed in the backing plate seat, and the backing plate is fittingly disposed in the limiting groove.

6. The welding base capable of changing surfaces rapidly as claimed in claim 1, wherein the backing plate and the backing plate seat are provided with matching pin holes, and pin shafts are arranged in the pin holes in a penetrating manner.

7. The quick resurfacing welding pedestal of claim 5, wherein an axial direction of the limiting groove is coincident with an axial direction of the central through hole.

8. The quick change welding-type base of claim 1 wherein the backing plate holder is fixedly attached to the side dam.

9. A welding device comprising a welding head, characterized by further comprising the welding base with the quick surface changing function of any one of claims 1 to 8, wherein the welding head is arranged opposite to the side surface of the bottom die body.

10. A welding device comprising a welding head, characterized by further comprising the rapid facing welding base of claim 2 or 3, said welding head being disposed opposite said weld bead.